头戴式光场显示技术研究进展  

Recent Development of Head-Mounted Light Field Display Technologies

作　　者：华宏 Hua Hong(3D Visualization and Imaging Systems Laboratory,James C.Wyant College of Optical Sciences,The University of Arizona,Tucson 85721,Arizona,USA)

机构地区：[1]3D Visualization and Imaging Systems Laboratory,Jame C.Wyant College of Optical Sciences,The University of Arizona,Tucson 85721,Arizona,USA

出　　处：《光学学报》2023年第15期70-79,共10页Acta Optica Sinica

摘　　要：光场显示器旨在通过重建三维场景在不同方向发出的几何光线来渲染三维场景的视觉感知,从而为人的视觉系统提供自然舒适的视觉体验,解决传统平面立体三维显示器中的聚散调节冲突问题。近年来,多种光场显示方法被尝试应用到头戴式显示技术中。本文对头戴式光场显示器的最新发展进行全面概述。Significance The human visual system(HVS)exploits a wide range of cues for the perception of three-dimensional(3D)space and shapes.Many different 3D display technologies have been developed over the years,most of which render a subset of these visual cues to facilitate 3D perception.For instance,the well-established stereoscopic 3D displays(S3Ds)render a pair of two-dimensional(2D)perspective images,one for each eye,with binocular disparities and other pictorial depth cues of a 3D scene seen from two slightly different viewing positions.Although they can create compelling depth perceptions,the S3Ds are unable to render correct focus cues for 3D scenes,including accommodation and retinal blur effects and thus are subject to a well-known vergence-accommodation conflict(VAC)problem.The VAC may be manifested as the mismatch between the depths of eye accommodation and vergence or the mismatch between the retinal blurring effects of rendered and real-world 3D scenes.These conflicts are considered the key contributing factors to various visual artifacts associated with viewing S3Ds,such as distorted depth perception and visual discomfort.Several display methods that are potentially capable of resolving the VAC problem have been explored,among which a light field display aims to render the perception of a 3D scene by reproducing the geometric light rays apparently emitted by the 3D scene in different directions and thus deliver a visual experience that is natural and comfortable for the HVS.The geometrical light rays may be reconstructed through a stack of discrete focal planes placed at different depths or through an optics array angularly sampling the different directions of the light rays viewed from different eye positions.The light field display method is considered one of the most promising 3D display technologies capable of addressing the VAC problem while offering great flexibility and scalability.Progress Over the last decades,many different methods have been explored and demonstrated to render light field effec

关 键 词：头戴显示器 光场显示 虚拟现实 增强现实 

分 类 号：TH74[机械工程—光学工程]